There are a lot of angry stars in Hollywood. Despite the fact that they are rich, famous, and have their every whim satisfied, some of them always seem so pissed off. It leaves us wondering what the heck has crawled up their tooshes to make them so miserable. We may never have the answer, which is fine with me. It's mesmerizing watching them act like spoiled little children. Take a look at the 9 brattiest A-listers ever.